# Originally published at https://gist.github.com/nzthiago/5736907
# I took that script and added the PPTX pieces, and a few comments
# If you like it, leave me a comment
# If you don't like it, complain to Github. :)

[Environment]::CurrentDirectory=(Get-Location -PSProvider FileSystem).ProviderPath 
$rss = (new-object net.webclient)

# Grab the RSS feed for the MP4 downloads

# SharePoint Conference 2012 Videos
$a = ([xml]$rss.downloadstring("http://channel9.msdn.com/Events/SharePoint-Conference/2012/RSS/mp4high")) 


# Walk through each item in the feed 
$a.rss.channel.item | foreach{   
	$code = $_.comments.split("/") | select -last 1	   
	
	# Grab the URL for the MP4 file
	$url = New-Object System.Uri($_.enclosure.url)  
	
	
	# Create the local file name for the MP4 download
	$file = $code + "-" + $_.creator + "-" + $_.title.Replace(":", "-").Replace("?", "").Replace("/", "-").Replace("<", "") + ".mp4"  
	 
	
	# Make sure the MP4 file doesn't already exist
	if (!(test-path $file))     
	{ 	
		# Echo out the  file that's being downloaded
		$file
		$wc = (New-Object System.Net.WebClient)  

		# Download the MP4 file
		$wc.DownloadFile($url, $file)

		}	
		
	}